CVE-2024-53092

In the Linux kernel, the following vulnerability has been resolved:

virtio_pci: Fix admin vq cleanup by using correct info pointer

vp_modern_avq_cleanup() and vp_del_vqs() clean up admin vq

resources by virtio_pci_vq_info pointer. The info pointer of admin

vq is stored in vp_dev->admin_vq.info instead of vp_dev->vqs[].

Using the info pointer from vp_dev->vqs[] for admin vq causes a

kernel NULL pointer dereference bug.

In vp_modern_avq_cleanup() and vp_del_vqs(), get the info pointer

from vp_dev->admin_vq.info for admin vq to clean up the resources.

Also make info ptr as argument of vp_del_vq() to be symmetric with

vp_setup_vq().

vp_reset calls vp_modern_avq_cleanup, and causes the Call Trace:

==================================================================

BUG: kernel NULL pointer dereference, address:0000000000000000

...

CPU: 49 UID: 0 PID: 4439 Comm: modprobe Not tainted 6.11.0-rc5 #1

RIP: 0010:vp_reset+0x57/0x90 [virtio_pci]

Call Trace:

<TASK>

...

? vp_reset+0x57/0x90 [virtio_pci]

? vp_reset+0x38/0x90 [virtio_pci]

virtio_reset_device+0x1d/0x30

remove_vq_common+0x1c/0x1a0 [virtio_net]

virtnet_remove+0xa1/0xc0 [virtio_net]

virtio_dev_remove+0x46/0xa0

...

virtio_pci_driver_exit+0x14/0x810 [virtio_pci]

==================================================================